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An USB flash drive is made out of a memory and extremely simple controller chip installed on a tiny board with a connector.
If the drive is completely unresponsive then the chip died. This is terminal, nothing can be done to save it or to recover what was in it.
click start control panel
administrive tools ,computer management ,device manager look through all
of your devices if you see a yellow question mark?or exclamation mark
! or red x right click to reinstall
drivers or if you can see your usb but
its not working ports(com&lpt)right
click update driver sometimes the wires inside
the cable will be damaged due to bending or stretching or placing heavy
equipment upon the cable, just replace the cable of
the hard disk, when you plugged the external disk drive you got that
windows could recognize the USB device change the cable everything should work
fine again, check the USB leads that
attach to the motherboard usually red-white-green-black make sure they are
securely seated and have no dust build up on them dust will cause static and a
lot of unforeseen problems also make sure the computers Ram and Cmos battery
are securely seated hope this helps
Most probably you have a drive letter conflict? If so, right click "My computer" choose "Manage" and locate "Disk management" - here, in the middle lower panel, you should be able to find your usb-memory stick, right click it and assign it a drive letter that you're sure is not in use.
Make sure the camera is on and pc is selected on the camera screen when connected to the computer. You will need to have PC highlighted and select ok on the camera as this starts the camera and computer to communicate. Once communication established the LCD screen of the camera goes dark and the computer should generate a removable disk drive. Check the System Tray (lower right corner beside the PC time) for Safely Remove Hardware. When you click on it, it should read "Safely Remove USB Mass Storage Device Drive ?:" If you dont see that, then check the Device Manager to see if the camera is recognized as USB Mass Storage Device. The camera uses the driver usbstor.
Plug one usb into your computer and the other end into the drive. If the light comes on, all is good. The computer should install the device for you automatically. To access the drive, go to My Computer and double click on the Removable Drive. Now you can transfer files.
#1. Reboot the computer.
#2. is the light coming on the card reader when you insert the card? If not, the computer is not recognizing the card. Make sure the card reader is plugged into a working USB port and the card is inserted in the correct orientation. If the light is coming on, simply go to "My Computer" and select the drive letter associated with the card.
My nx2 is working again after having the "red light/blue light/I/O Error" problem. I just:
1. turned off my computer
2.unplugged the HD,
3. took out the HD from the enclosure and plugged it back into the enclosure,
4.started up my computer without the HD being plugged in
5. after my computer had been on for a minute, I plugged the HD in and my computer recognized it and had the proper mixture of red and blue light coming from the HD, indicating it's working properly.